Cylinder pawl for jacquards



Nov. 27, 1928. 1,692,949

J. B. OLCH CYL'INDER PAwL Foa JAcQUARDs Filed May l1, 1927 Sheets-Sheet 1 Nov. 27, 1928. 1,692,949

J'. B. oLcH CYLINDER 'PAWL FOR JACQUARDS y Filed May 11. '1927 n ets-sheet 2 A fNvENTore Jeoa B. OLCH Patented Nov. 27, Vi923.

'UNITED STATES PATENT orifice.;V

JACOB B. @LCI-I, OF PROVIDENCE, RHODE SLAND, ASSIGNR TO CROMPTON & KNOWLES LOOM VOR-KS,

CTUSETTS.

` CYLINDER PAX-VL Application sied May 11,`

This invention relates to improvements in jacquards for looms and it is the principal object of the invention to provide improved means for controlling the hooks which serve to give the acquard cylinders angular movements at periodic intervals. y

As ordinarily consti' cted jacquards are provided with one or iore cylinders which are moved toward and from a series of needles. The cylinder over which a series of cards is trained moves toward the needles and certain of the latter will be depressed and others will remain uninoved according to the punching of the particular card in action. 'lhe device for successively moving the cards vto position includes at least onek hook which moves about a lined center and as the cylinder moves outwardly from the series of needles the hook engages a pin or other similar device rigid with the cylinder to cause the latter to rotate'on its axis. lf the cylinder has four faces it is necessary' that the hook and pin give the cylinder a movement of approximately 90O and during the rotatory movement of the cylinder the hook will move upwardly along an arc of the movement of the cooperating pin.` rlhis slight movement of the hook has made it necessary heretofore to employ springs in the controlled devices for the hook. lNhere two or more hooks are employed, that is one for thetop and the other for the bottom, it is customary to connect the hooks by a link and control them from a cord which hangs down within reach of the weaver. lvlhen a reversal is to be effected the cord will be moved either down or up and if moved down will be caught under a notch or other detachable holder. The cord usually is provided with a spring accommodating the aforementioned slight movement ofthe hooks as they move vertically under the influence ofthe turning pins.

lt is an important object of my present invention to provide a pull meansfor the hooks which will obviate the necessity of the springs so that the control may be had from a card repeater corresponding in function to the so-called multipliers for looX looms,'this object being attained as set forth herein by the use of hooks which are positively moved in one direction by the control device and free to move in the opposite direction to accommodate the movement of the hooks under the inuence of the pins.

With these an d other objects in View which OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSA- FOR JACQUARDS.

1927. Serial No. 190,584.

will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein la convenient embodiment of my invention is set forth, f y

il ig. l is a side elevation of a jacquard having iny invention applied thereto,

Fig. 2 is a front elevation looking in the direction of arrow 2, Fig, l and showing the lower hook in operative position, L Fig. 3 is a vertical section on line 3-3 looking in the direction of arrows 3, Fig. l and showing the safety pawls,

Fig. l a detailed horizontal section on linee-4i, Figijl,

lTig. 5 is a perspective View of the pull and safety pawls together with their control. devices and,

Fig. 6 a view indicating one form of card repeater which maybe employed in connection with my present invention.

Referring to the drawings I have indicated a Jacquard frame l0 and a jacquard cylinder ll rotatably mounted on bearings 12. By means 4of slide rods 13 said cylinder is moved back and forth in horizontal direction in a manner well understood with those-faoted as at 2l to the frame l() and has a hook end 22 which when in lowered position will operate to give the cylinder an angular movement in a counter-clockwise direction. i A second hook 23 is pivoted as `at 24 below thehook 2O has a hook end 25 which when in raised operative position will give the cylinder an angular movement in a clockwise di-4 rection.

The control mechanism for said hooks 2O and 28 is shown in perspective in Fig. 5 where it willbe seen that a rock shaft 30vhas secured thereto a relatively long arm 31 and a relatively short arm 32. A link 33 is pivoted to the arm 31 and has a slot 34 in the upper end thereof which receives a pin 35 projecting from thehook'120.j Saidvhookis weight? ed so that thepinwill normally be heldi against the upper end oi' the slot 34 by the weight of said hook. A second shorter link 36`is piv'otally connected to thearm 3'2`and basa slot 37 in the upper end thereof' which receives a pin 38 projected from the hook 23. The latter hook is provided with a counter weight 39 which serves to' hold the pin'88 in'y the bottom of slot 37.` Both of said arms 3l and32 are secured to the'shafft 30 so as tok Inove with the latter when'a flexible 'cord C connectedto arnil pulls downwardly.

The safety pawls are locatedon that side of'thej acduard'opposite the pull over pawls and comprise upper and lower pawls lO'and L il respectively which move about iixed pivots`42 andi4'3respectively. A link a5 connects the pawls together andA one of said pawls is extended tov have connection by controlled by ajack cord 62 and actuated by means of aY shortlnk ,46 with a contr-ol lever 47 secured to the rock sl'ia'itBO. Saidlever 47 has attached thereto asprine S the normal action ol which is to turn the shaft in a' clockwise direction asviewedin Fig. 5. Said pawls and ll have teeth 5() and 5l respectively whi'c'h cooperate with the pins on the adjacent side'fofy the cylinder to complete an operation to initiate the pull over hooksQO or 23L In Fig. 6 I-have illustrated a well known form kof so-called cardE repeater such as is showin in' detail in patent' to A. R. Patten, No. 578,068;-issued` March 2,71897. It is suiicientf'r the present description to state that lever' 60 of said'repeater is connected to the cord CV illustrated in Fig. 5 and that said lever'cooperatesg with a chain 6l which is controlled by'a'jaick` cord 62'and actuated by afrodfr, At'the desired time the lever 60 will rock to depress'cordC to give the shaft 30anangular movement in a counter-clockwise direction.y

F ig. 2 illustrates another means for controllingthe4 pull over pawls consisting` of a rope 7Oha'ving` a. handle 71 at the lower end thereof which cooperates with a bracket 72 provided with a notch 7 3 by means of which the handle canbe held in downward position.

In operation' withv the parts shown in the position indicated in Figi 2 the cylinder will move black and forth horizontally by mecha.- n'ism` not shown and on each movement to the right hook 25 will engage the adjacent pin to cause the cylinder to rock about its axis. As this action takes place the pin will move downwardly with respectto its starting positions that the hook 25 will be depressed slightly'. This will 4 be accompanied by a slight rising of' pin 38 in slot 37, the cord C being undisturbed by this action. Vhen it is desiredto reverse the direction in which the cards are being' fed the cord @will be movedl upwardly byV either of the devices Aset forth andspring` S willjact to give the shaftSO a slight right hand"rotation'.` The bottom of slot 37 will act to litt the weight 39 to lower the hook end 25 which was previously in action and the upward movement ol link 33 willpermit the weighted hook end 22 of leveru 20 to 'fall inte operative position so that as the cylinder is moved outwardly to the right -r'omthe position shown in Fig. 2 it will be given an angular movement in counterclockwise' direction;y As' the" hook end 22 risesthe pin 35 will move downwardlyin the slotY 23a-and the arcuate movement ot thej'i'in cooperating` with said hook end aboutthe axis oi the cylinder will not disturb the cord C or the rope 70. y

'lhe safety pawls are for the purpose of moving the cylinder intoproper horizontal position should the cylinder stick and not be gii'en a complete quarter movement byj the pull over pawl, ils shown in Fig. 3 the cyl# inder is' indicated as improperly 'thrown in dotted lines but the lower hook 5l serves to re* store the cylinder to its pro-per' position thus completing' the movement which was only partly effected by the upper hook on the previous outward movement of the cylinder. Devices for assisting' thesafety pawls in restoringtlie cylinder to proper position such as spring;` hammers can be used but they are not illustrated herein as they are well understood and form no part of my presentinvention. Said safety pawls, acting` only to4 complete the movement of the cylinder, are notrequired tofoillow the arcuate movement of the pins and it istherefore not necessary that they be permitted to rise and Jfall .vitliout'disturbance oi the cord C or the. rope 70.

From the foregoing it will be seen that'I have provided a controlmechanism for'jacquard'pull over pawls so arranged that they pawls may counteract a: slight rising and falling;V movement asthe acquard cylinder turns without 'disturbing the control mechanism for said pawls thus renderingl unnecessary the springs and other holdingY devices which customarily are employed in jacquards 'for changing the direction ofthe cylinder.

Having' thus described my invention it will be apparent that changes and modifications` may be made thereinby those skilled in the art without departing from the spirit and' scope of theinven'tion andI do not wishto be limited to the details herein disclosed, but what I claim is 1. In a jacquard mechanism having a cylinder movable back and forth in a prescribedl path and having a plurality of pull over pins, a pull over pawl having` a ixed'pivot, said pawl to cooperate with the pins one at a time to cause a partial rotation of the cylinder as the latter moves,` a control member tor the pawl, and means defining a` loose connection between the pawl and the member to littA said pawl positively away from the pins when said lUU control member moves in one direction, said pawl being movable away from the pins independently of the control member because of the loose connection.

2. In a jacquard mechanism having a cylinder movable back and forth in a prescribed path and having a plurality of pull over pins, a pull over pawl to cooperate with the pins one at a time to give the cylinder a partial rotation as said cylinder moves in one direction in its path, a xed pivot for the pawl, a control member for the pawl, and a pin and slot connection between the pawl and the member whereby movement of the member in one direction will positively move the pawl out of the path of the pins, the pawl being movable together with the pin away from the axis of the cylinder independently of movement on the part of the control member.

3. In a jacquard mechanism having a cylinder movable back and forth in a prescribed path and having a plurality of pull over pins, a pair of pull overvpawls located on opposite sides of the axis of the cylinder, fixed pivots for said pawls, a control member for the pawls movable to two positions, loose connections between the control member and the pawls, one of said pawls being operatively related to t-he cylinder and the other inoperatively related when the control member is in one position, and th-e other pawl being operatively related tothe cylinder when the first named pawl is inoperative relatively to the cylinder when the control member is in the other position, whereby one pawl is operatively related to the pins at a time, a pawl which is operatively related to the pins ot the cylinder being movable away from the pins independently of the control member because of the loose connection.

4. In a jacquard mechanism having a cylinder movable back and forth in a prescribe-d path and having a plurality of pull over pins, a pair of pull over pawls located onopposite sides of the axis of the cylinder, fixed pivots for said pawls, a control member for the pawls movable to two positions, loose connections between the control member and the pawls, one of said pawls being operatively related to the cylinder and the other inoperatively re-A lated when the control member is in one position, and the other pawl being operatively related to the cylinder Vwhen the first named pawl is inoperative relatively to the cylinder when .the control member is in the other position, whereby one pawl is operatively related to the pins at a time, the pawl which is operatively related to the pins of the cylinder being movable away from the pins independently of the control member because of the loose connection, and a counterweight connected to one oit said pawls ten-ding normally to establish connection between the control member and said pawl.

In testimony whereof I have hereunto affixed my signature.

JACOB B. OLCH. 

